GodlyVerses

If you avoid the major sins which you are forbidden, We will remove from you your lesser sins and admit you to a noble entrance [into Paradise]. - Quran An-Nisa(The Women) 4:31 (islam)

The Prophet (ﷺ) said, "Avoid the seven great destructive sins." The people enquire, "O Allah's Messenger (ﷺ)
What are they? "He said, "To join others in worship along with Allah, to practice sorcery, to kill th
life which Allah has forbidden except for a just cause, (according to Islamic law), to eat up Rib
(usury), to eat up an orphan's wealth, to give back to the enemy and fleeing from the battlefield at th
time of fighting, and to accuse, chaste women, who never even think of anything touching chastit
and are good believers. - Hadith Al Bukhari 2766 (islam)
Book 55, Hadith 29
Vol. 4, Book 51, Hadith 28

The unlawful (haram) is what the Lawgiver strictly forbids. Someone who commits an unlawful act deserves punishment, while one who refrains from it out of obedience to the command of Allah is rewarded.
(n: Scholars distinguish between three levels of the unlawful:
(1) minor sins (saghira, pI. sagha'ir), which may be forgiven from prayer to prayer, from one Friday prayer Uumu'a) to another, and so forth, as is mentioned in hadith;
(2) enormities (kabira, pI. kaba'ir), those which appear by name in the Koran or hadith as the subject of an explicit threat, prescribed legal penalty, or curse, as listed below at book p;
(3) and unbelief(kufr), sins which put one beyond the pale of Islam (as discussed at 08.7) and necessitate stating the Testification of Faith (Shahada) to reenter it.
Repentance (def: p77) is obligatory for all three (al-Zawajir 'an iqtiraf alkaba'ir( y49),1.5-9).) - Fiqh Umdat as Salik c2.5 (islam)

You are the best nation produced [as an example] for mankind. You enjoin what is right and forbid what is wrong and believe in Allah. If only the People of the Scripture had believed, it would have been better for them. Among them are believers, but most of them are defiantly disobedient. - Quran Ali 'Imran(The Family of Imran) 3:110 (islam)

Those who follow the Messenger, the unlettered prophet, whom they find written in what they have of the Torah and the Gospel, who enjoins upon them what is right and forbids them what is wrong and makes lawful for them the good things and prohibits for them the evil and relieves them of their burden and the shackles which were upon them. So they who have believed in him, honored him, supported him and followed the light which was sent down with him - it is those who will be the successful. - Quran Al-A'raf(The Heights) 7:157 (islam)

The believing men and believing women are allies of one another. They enjoin what is right and forbid what is wrong and establish prayer and give zakah and obey Allah and His Messenger. Those - Allah will have mercy upon them. Indeed, Allah is Exalted in Might and Wise. - Quran At-Tawbah(The Repentance) 9:71 (islam)

And let there be [arising] from you a nation inviting to [all that is] good, enjoining what is right and forbidding what is wrong, and those will be the successful. - Quran Ali 'Imran(The Family of Imran) 3:104 (islam)